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A Real-world What-Where-When Memory Test
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ROC measures of memory accessibility.

Chad Dubé1

  • 1University of South Florida, Tampa, FL, USA.

Quarterly Journal of Experimental Psychology (2006)
|July 8, 2022
PubMed
Summary
This summary is machine-generated.

Laming's new memory accessibility measure is questionable. This study proves it depends on response criteria and variances within Unequal-Variance Signal Detection Theory (UVSDT), even with constant sensitivity.

Keywords:
ROCRecognition memorymemory accessibilitysignal detection

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Area of Science:

  • Cognitive Psychology
  • Psychometrics
  • Memory Research

Background:

  • Measuring memory accessibility is crucial for understanding memory retrieval.
  • Laming proposed a novel measure of memory accessibility using recognition testing and receiver-operating characteristic (ROC) curve analysis.
  • This measure is calculated at the point where the ROC curve's derivative is 1.

Purpose of the Study:

  • To critically evaluate Laming's proposed measure of memory accessibility.
  • To determine if Laming's measure is a valid indicator of memory accessibility within the framework of Unequal-Variance Signal Detection Theory (UVSDT).

Main Methods:

  • Theoretical analysis within the framework of Unequal-Variance Signal Detection Theory (UVSDT).
  • Mathematical proof to demonstrate the dependency of Laming's measure on specific parameters of UVSDT.
  • Examination of the measure's behavior across different response criteria and variance assumptions.

Main Results:

  • Laming's 'Accessibility' measure is dependent on the response criterion location within UVSDT.
  • The measure's value varies with the underlying variances of UVSDT, irrespective of the bias definition used.
  • This dependency persists even when discrimination performance (sensitivity) remains constant.

Conclusions:

  • The validity of Laming's 'Accessibility' measure is questionable from the perspective of UVSDT.
  • The measure may not accurately reflect true memory accessibility due to its dependence on response criteria and variance.
  • Further theoretical and empirical work is needed to validate or refine measures of memory accessibility.